“Moses said to the Lord, “O Lord, I have never been eloquent, neither in the past nor since you have spoken to your servant. I am slow of speech and tongue”. 

Ex 4:10 NIV 

In our everyday life we go to great pains to choose the best person for any task needed. We take into account experience, qualifications, aptitudes, and personal characteristics. We compare one possible person with another. But in the end we only know when a person is in the job whether he or she is the right person or not. 
God wanted a person to speak to the Israelites on his behalf – and to the Egyptians. And he chose a person who was a poor speaker, neither eloquent nor glib. And Moses felt quite overwhelmed by the task God was calling him to. It is easy to regard this reticence on the part of Moses as evidence of his lack of faith or as disobedience. But we need to see that Moses was mature enough to know himself and his strengths and weaknesses and that the speaking part of his leadership role would be a real challenge. Better to be realistic than to be cockily over-confident. 
In all service for the Lord, no one is worthy to be called to the task. So God chooses – and uses – people who are too young, ill-qualified, inexperienced, and inadequate. Despite their shortcomings he takes them and brings about his purposes. Sometimes along the way he teaches them how to improve, and leads them from small things to big things. Often, through the work of the Holy Spirit in them, they find they are not nearly as unsuitable as they originally thought. When Christ calls you, think carefully, then claim his power to accomplish. 

Lord, help me to be humble and willing to serve you always.